Method of manufacturing covered-joint hinges



Dec. 18, 1928. 1,695,288

W. C; KENYON IBTHOD OF MANUFACTURING COVERED JOINT HINGBS Filed Nov. 12, 1926 3 Sheets-Sheet 1 gag '2 Dec. 18, 1928.

W. C. KENYON IBTHOD OF MANUFACTURING covsnsn JOINT RIMES 3 ShootsSheet 2 Filed Nov. 12, 1926 @..W v) y m@ %'w Qty w. c:. KENYON METHOD OFIANUFACTURING COVERED JOINT HINGES Dec. 1a, 1922;

3 Shoots-Sheet 3 Filed Nov. 12, 1926 Patented Dec. 18, 1928.

PATEN T mee WILLiAlM c. KENYON'KQF no'cxrortn', rumors, essienor'i T rim Arw ooiiilirnouuri MACHINE COMPANY, A GOPARTNERSHIP oorrsrs'rme or SETH is. A'rwoon Ann 7 JAMES-'1". A'I'WOOD, or ROCKFORD; ILLINOIS.

METHOD OF MANUFACTURING oovnnnnornr Entries.

Application filed November 12, we; Serial no. 149,62 r

This invention relates to covered joint hinges of the type especially designed iior hanging automobile doors. These hinges comprise an outer and an inner hinge mem her having interiitting l mi'i okles with the outer hinge member shaped to provide a covering portion adapted to cover and conceal the knuckle joint. The present inventionuhas to do with hinges of this kind manufactured from flat inotal' stock as distinguished from those cast or possibly forged to shape. My invention is, moreover, an improvement on that disclosed in my copending application, Serial No. 40,759,

"led July 1-, 1925.

The primary object of the present invention is to simplify and improve the method of manufacturing, hinges of theoharacter descrihech with theyiew to reducing the cost of manufactureand to producing a superior hinge construction. v

Other objects and attendant advantages will he appreciated'by those skilled in this art as the invention becomes better understood by reference to the following descrip; tion when considered in connection with the accompanying drawings in which- Figure 1. is a sectional view illustrating the first operation of my i'i'npro'ved method;

Figs. 2 and 3 are end and face yiews, respectively, of a blank after the first operation; I r

Fig. renews thesecond operation; 7

Fig. 5' is a face View after the second. operation; 7v H Fig 6 shows the third operation);

Fig. 7 shows the blank in position-for the fourth operation;

Fig. 8 shows thecoinpletioii' of the foiirth p t v q r Fig. 9 shows the completion of the fifth operation; 7' p I Fig. l() is a: section; through the diesa'iid nk Sh w in -.9:

i Fig: 11 isQa; perspective View of the dies used in the fifth operation and; showing the blank inserted'before startingthis operation; and I liq/and 13 are' views'o'ftlieiniier face and end, respectively,'of the hinge members assembled: v p i p The covered joint hinge comprises an inner and an outer hinge 1 member designated generally by 14 and 15, respectively Figs.

which constiti from bar stock it 12 and 13, each formed flOlll flELll metal stock and having a knuckle portion which inter-fits with the knuckle of the other memher and 1S held in operative relation there with 111161113}? of apintle"pin ldr In this nstance the inner hinge member has two knuckles 17 and the outer hinge member three knuckles 18. This arren'gemei'it is not essential except as to certain phases of'the invention and as specifically defined in 'certain of the CllllDS. r The inner hinge member 14 may he manu iajctu'red by any suitable method such fer exan' pleflas disclosed in my'copending application above mentioned, an'dlthe outer memher is manuiectured in accorditnce with the method i hic-h will'now he described? and the SUlOJGCt nnitter of the present inventio After a; blank 19 has been cut to le ri th N is grooved on-'- one rice only preferably oy means of one, or more millingcutters depending on the number of knuckles; to partially shape the knuclll'es and provide clearance for the knuckle or knuckles of the c om}leniental hinge mrii; her. In the example shown, two milling cutters in CO-ZtXlEtl rel tion, idesigneted by theknuokle propeiu The secondoperation consists in blitiik.

ing out the materiali at the hottoni or the grooves from the end 23 to the shoulders 27. This hl k'ing or slotting is preferably done by a stainpingorpun hing operation employing a blanking die 2s shown in Fig. 4. This operttion eaves; separate knuckle parts 25 when are ooiitinu'zttions of the knuckle partsQSfoinied the grooving," a'n'd also le efves shoulders" 27" right angles to the pla'ne'oi' the blank; and' providingabutnient faces hetween the kiiiickle portions 26. As hown iii Fig; 1 5 t-liesh ders'QT are inclined outwadly away froin' theend Qf-L tliat is',"'the slotted end of the blank" for a purl Iat'er' connec ion" o' 'ratwn;

offset position shown in said figure.

j The flat blank, grooved and slotted described, is then placed on a die 28 with one end resting on a ledge 29 and is broken down at its slotted end by the action of a die 31, Fig. 6. The die 31 has an angular corner 32 which makes a corresponding depression 33 across the knuckle parts 25 and, by reason of the shape of this and the die 28, the said knuckle parts 25 will be turned laterally as shown by dotted lines in said figure.

This bending operation is the first of a series in forming the slotted and grooved end portion of the blank into a knuckle. These operations, that is, for shaping or fashioning the knuckle, may be performed in any suitable or preilerred manner and in this and in my copending application above mentioned they have been referred to as bonding or curling operations. After an initial bending operation the lat rally turned end is placed in a die such as 34, Fig. 7, and pressure is applied either endwise on the blank or against the die to force the lateral ly turned end into the said die to curl or roll said end into the knuckle as shown in Fig. 8. In my previous application the parts shown in Fig. 7 were inverted so that the part 35 acting against the end of the blank offset from the slotted end became the pressure applying die, whereas in the present instance the die 34 moves in the pressure applying stroke and the flat end of the blank is rigidly clamped to the stationary die part It is immaterial, however, whether the die 34 is stationary or movable, since the bending, curling or rolling operation may be performed equally well in either way.

Following the formation of the knuckle the blank is clamped in a holding die 36, Fig. 9, having a bottom die part 37 and is sub jected to the action of die 38 which bends the knuckle end of the blank laterally to the The dies 37 and 38 are shaped as shown in Figs. 10 and 11, to perform additional operations, namely crowning the covering portion of the knuckle, broaching the sides of the knuckle parts and aligning the knuckles. To this end the lower die 37 is shaped to provide breaching cutters 39 which enter between the knuckle parts and broach the sides thereof and at the same time enter into the operation of aligning the knuckles. The curved knuckle parts 25 will be pressed against the circular seats a1 and the end portions 42 of the knuckle will be subjected to the action of the top die 38 which is shaped to crown the knuckle, as shown in 12. This crowning operation is effected by displacement of the metal to conform to the shape of the dies and'as a result of such displacement the inclined shoulders 27 will be brought into parallel or coplanar relation as shown in Fig. 12. At the same time the knuckles being confined on all sides by die faces they will be accurately aligned. The pivot pin hole will be bored, it being noted that the depression 33 is so located as to lead the boring tool laterally away from the cover side of the knuckle so that the hole will be slightly eccentric with respect to the cover portion, thus gaining a certain degree of clearance between the periphery of the complemental knuckle and the internal wall of the cover portion.

As the result of the foregoing method of lanufacture the number of operations is reduced, it being particularly? noted that there is but a single milling operation, namely, that of milling the grooves. The slot blanking operation is especially simple and at the same time provides the shoulders 27 which serve stops adapted to abut against the inner hinge member let for limiting the opening of the hinge. The depression 33 is formed simultaneously with the first bending or break down operation. Following the formation of the knuckle proper in the fourth operation shown in Fig. 8, the knuckle is turned or rolled laterally, crowned, broached and aligned in a single set of dies. It may be said, therefore, that the operations of laterally offsetting the knuckle, crowning, breaching and aligning are performed simultaneously; 7

It is believed that the advantages of my improved method will be apparent from the foregoing, although it should be understood that my invention is not confined to the details and specific operations described, since in practice these may be changed and modified within the spirit and scope of the invention as expressed in the appended-claims.

I claim:

The method of manufacturing a covered joint hinge member from a flat metal blank, consisting in grooving one side only of the blank, said grooving extending longitudinally from one end and terminating at an intermediate point, slotting through the bottom of the grooving adjacent to said end, bending said slotted end laterally, and bending or curling said end and grooved portion to form a covered joint knuckle.

2. The method of manufacturing a covered joint hinge member from a flat metal blank, consisting in grooving one side only of the blank, said grooving extending longitudinally from one end and terminating at an intermediate point, slotting through the bottom of the grooving at said end by a punching or blanking operation, said slotting leaving separated knuckle parts extending from the grooved'knuckle portion which is adapted to provide a covering for the knuckle joint, and subsequently bending or curling the said knuckle parts and grooved portionto provide a covered joint knuckle having said separated knuckle parts at an IOU open side and said grooved covering portion at the opposite side.

3. The method of manufacturing a covered joint hinge member from a flat metal blank, consisting in milling two parallel grooves in one side only of the blank, said grooving extending longitudinally from one end to an intermediate point, slotting, through the bottom of said grooves from said end to a point intermediate the ends of the grooves, thereby forminga shoulder at the open end ofeach groove, said shoulders being inclined from the center outwardly away from the end face above mentioned, bending or curling the grooved and slotted portions to form a covered joint knuckle, and crowning the covering portion of the knuckle by a stamping operation which by displacement of metal brings said inclined shoulders substantially into coplanar relation.

4. The method of manufacturing a covered joint hinge member from a flat metal blank, consisting in grooving one side only of the blank to provide spaced knuckle parts and a cover portion, bending or. curling said grooved end portion of the blank into a knuckle, and simultaneously offsetting said knuckle from the plane of the blank body, crowning the cover'portion of the knuckle, and aligning the knuckle parts.

5. The method of manufacturing a covered joint hinge member from a flat metal blank, consisting, in grooving one side only of the blank, said grooving extending longitudinally from one end and terminating at an intermediate point, slotting through the bottom of the grooving adjacent to said end, said slotting leaving separate knuckle parts and a shoulder at the outer end of the grooving, bending said knuckle parts laterally and simultaneously forming an angular depression at the bend, and further bending or curling said knuckle parts and the adjacent grooved portion to form a covered joint knuckle proper.

6. The method of manufacturing a covered joint hinge member from a flat metal blank including grooving one side only of the blank, said grooving extending longitudinally from one end and terminating at an intermediate point, slotting through the bottom of the'grooving at said end by a;

7 blank, consisting in grooving one side only of the blank, said grooving extending longitudinally from one end to an intermediate point, slotting through the bottom of the grooving adjacent to said :end, said slotting'leaving separated knuckle parts and a shoulder at the outer end of the groov-' ing, bending said knuckle parts laterally and simultaneously forming an angular de pression at the bend, furtherbending or curling said knuckle parts and the adjacent groove portion to form the knuckle proper, laterally offsetting the knuckle from the plane of the blank by a final bending oper WILLIAM o. KENYON. 

